The following figure shows a two-button touch switch and a one-touch delay switch made with a 555 time base circuit. In the figure, M1 is an "open" touchpad. When a human touches, the clutter signal of the human body is added to the low-level trigger IC of the time base circuit, the second pin is set, the circuit is set, and the 3-pin output is high. K is electrically connected, its normally open contact is closed, and the controlled appliance is energized. M2 is the "off" touchpad. Once touched, the clutter signal of the human body is added to the threshold terminal IC6 of 555, the circuit is reset, the 3 pin outputs low level, the relay loses power and trips, and the controlled appliance stops working.
Double-key touch switch circuit fabricated by 555 time base circuit
Push wall switch socket, hot swich socket, swich and socket
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